Boiler.



J. J. RUHAN.

, BOILER.

APPLICATION FILED HA3. 9, 190a.

Patented Nov. 10, 1908.-

2 6 m z 2 W m W I I James 9%M w i is the

w Greece front removed PATENT OFFICE.

JAMES J. ROIIAN, 0]!

ST. LOU 1S, MISSOURI.

BOILER.

110. 903,781. Specification 0! Application filed March 9,

To all whom it may concern:

Be it known that I, JAMns J. Ron/m, 1 citizen of the United States. andresident of St. Louis, Missouri, have invented certain new and usefulImprovements in Boilers, of which the following is s specificationcontaining a full, clear, and exact description, reference being had tothe sccolnpal'iyiug drawings, forming a part hereof.

My invention relates generally to boilers, and more particularly to ncombination boiler wherein the lmiler shell is provided within series ofordinary fines or fire tubes. there being a series of wutor tubesconnected to the boiler shell at their u ppcr ends and to mud drums attheir lower ends, and which boiler is provided with tubular grate bars,which are connected by and water legs to the boiler shell, thusproviding means whereby e maximum percent-- age of the heat beneath theboiler is applied to the water line for the purpose of generating steam;and my present invention is an im rovementon the Water tube boiler shownan described in Letters Patent No. 777,748, issuedtome December 20,1904. The object of my invention isz ist, .to simplify the constructionof the boiler shown in the potent above referred to; 2nd,-To soconstruct a combination lire tube and water tube boiler as that a downdraft arrangement is provided; and, 3rd,- To provide tubular grate barsfor the boiler furnace, which tubular grate bars are con nected byheaders and water legs with the boiler shell, which, in combination withthe water tubes, provide increased circulation for the water in theboiler.

To thesbove purposes, my ipvention consists 'in certain novel features,of construction and arrangement of parts, which will be hereinafter morefully i orth, pointed out in the claims, and illustrated in theaccompanying drawings, in which Figure l is at side elevation of adowndraft holler of my improved construction, and with the furnace frontand boiler setting in vertical section; Fig. 2 is a front elcvs tion ofth boiler seen in Fig. 1, with. the furnace front removed; Fig. 3 is syertresl section taken npproximatel on the line 3-3 F1 1 Big. 4 is e sie elevation of ,a. ulodifi ed lorm of the boiler without the dovndrsfi;arran ment; Fig. 5 is afront 2 w thin of the oiler seen in Fig. 4, withFig. 6 is a vermcans of headers I Letters Patent.

1908. Serial NCK 419,985.

Patented Nov. 10, 1908.

" lieal section taken approxinmtcly on the line e s oi Fig. 4. Referringby numerals to the accompanynw drawings: 1. designates on ordinarybo1ler shell, pmviiilotl with :iho usual fire tubes or flues 2, andnrrinigetl at the rear end of said shell is the usual lllfifltlllfif);3. which leads to the stack.

Positioned against the sidt boiler settin l, of ordinary construction,is a pair of ongitudinslly extending mud drums D, the ends of which arenormollv closed by removable cups (3; and corn'iecteil to the forwardends of said drums is a pair of verticslljy disposed water legs 7, theup or cruise which connect with a, horizontally disposed pipe 8, which,lies immediately in front of the lower portion of the boiler shell andbeing connected thereto by means of the union 9.

(Joint- ;Eed to the water legs 7, adjacent their centers, ere elbowsconnected thereto in any suitable manner is s horizontnlly disposedheader ll, which is transversely arranged in the front portion of theboiler setting.

Connected to the rear portions of the mud tlrums 5 are verbally disposedwater legs 12, the upper ends of which connect with a pipe 13, whichenters the rear end and lower portion of the boiler shell 1.

Positioned beneath the approximate center of the boiler shell 1 slid init plane slightly shove the plane occupied by the header 11 is atransversely disposed header 14., the ends of which are connected bymeans of water tubes '15 with the sides of the shell l; and connectingthe headers 11 and 14 2t series of .nhes 16, which perform the funeti onof tubular grate burs.

. Connec ed to the sides of the shell 1, in front of tubes 15, are theupper ends of a. series of circulation tubes 17, which extend downward ashort distance below the under side o'l'athc shell. and said tubes arethere bent into wmroxinui-te horizontal planes, as designated )y i endwith the set of tubes on one side of the boiler rossing theset on theopposite side; and the lower portions 0 said tubes extend verticallydownward, as indicated by 19, and their lower ends are connected in anysuitable nmnner lo the forward portions ofthe" headers 55.

A series of circulation tubes 20 are connected at their npperends lo therear porwnlls of the so. points tion of the shell 1, in slincment withthe up to; and, i

per ends of the tubes 15 and 17, and the lower ends of said tubes beingconnected to the rear portions of the mud drums 5; and the centralportions (if all of these tubes 20 are bent, as designated by 21, so asto extend entirely across the fire box or space between the side wallsof the boiler setting, and these bent portions cross one another at ewalls.

22 designates a horizontally disposed partition of fire brick, oranalogous material, which is positioned on the horizontally disposedportions 18 of the tubes 17, and said partition extending from theboiler front to a point a short distance to the rear of the pair oftubes 15; and vertically disposed between the header 11 and thispartition 2 ,is a partition or bridge wall 23.

Positioned just inside the forward portions of the mud drums 5, andbeneaththe ends of the headers 11 and 14:, are side walls 24 of the firebox, beneath which is arranged the usual grate bars 25; and locatedbetween the rear ends' of these walls 2 1 is a transversely disposedwall 26,'there being an open space between the top thereof and the underside of the header 1 1.

In Figs. 4 to Ginclusive I have illustrated a boiler constructed withoutthe down-draft arrangement, and in which construction the headers 11 and14, together with the tubular grate bars 16, are dispensed with, and allof the circulation tubes 17 are bent so as to extend transversely acrossthe fire box. WVhen this form of the boiler is in use, fire is made onthe grate bars 25 and the smoke and products of combustion from saidfire pass rearward between the bent portions 18 and the circulationtubes to the rear of the partition 22. r

When the preferred construction of my improved boiler is in use, fire ismade upon the tubular grate bars 16, and the heat,

flame, and products of combustion from said pipe pass downward betweensaid tubular grate bars as a result of the down draft principle, andsaid heat, flame, and products of combustion pass between the header 14and bridge wall 26, from thence rearward between the bent portions 21 ofthe water tubes 20, from thence upward and forward between the partition22 and the under side of the boiler shell, and from thence rearwardthrough the fire fiues 2, and finally through the breaching 3 to thestack.

The'water from the shell 1 fills all of the water tubes, mud drums,headers, water legs, and tubular grate bars; and by the arrangement ofthe fire fines in the shell 1, the heat and products of combustion arebrought into direct contact with a large area of heating surface; and,as a result, the water is very uickly heated and steam is generatedtherea (point approximately midway between said s1 As soon as the waterin the circulation tubes becomes heated, a circulation of the water isestablished upward through said tubes into the shell, dud from thencedownward through the water legs, 7 and 12 into the mud drums 5, and fromthence back into the circulation tubes; and circulation is alsomaintained through the headers 11 and 14, tubular grate bars 16, andtubes 15.

.A boiler of my improved construction combines water tubes with anordinary fire flue boiler shell, is very compact, is easily assembled,provides a maximum area of heating surface, inasmuch as all of thetubes, headers, 'water legs, and tubular grate bars are filled withwater fIOllItllB boiler; and such arrangement providing for increasedcirculation of the water while the same is being heated and convertedinto steam.

All the heavier impurities and sediment in the water finally gravitateinto the header l1 and mud drums 5, from whence said impurities andsediment can be readily (lischarged by removing the caps'or plugs on theends of saidheader and mud drums.

I claim 1. The combination with a fire tube boiler arranged in a boilersetting, of a pair of mud drums arranged at the sides of the fire box ofthe furnace, a pair of vertically disposed water legs connecting eachend of the boiler with the mud drums, a pair of transversely. disposedheaders arranged over the fire box, the front one of which headers isconnected to the front pair of water legs, 10o tubular gratebarsconnecting the headers, a series of water tubes connecting theboiler with the mud drumsbetwe'en the water legs. which water tubes areprovided with transversely bent portions which extend beneath the boilerover the tubular grate bars, and a fireproof partition extendingrearward from the boiler front immediately over the tubular grate bars,which fireproof partition is supported by the transversely bent portionsof the water tubes.

2. The combination with a fire tube boiler arranged in a boiler setting,of a pair of mud drums arranged at the sides of the fire box of thefurnace, a pair of vertically disposed water legs connecting each end ofthe boiler with the mud drums, a pair of trans versely disposed headersarranged over the fire box. the front one of which headers is connectedto the front pair of water legs, itulmlar grate bars connecting theheaders, a series of water tubes connecting the boiler with the muddrums between the water legs, which water tubes are provided withtransversely bent portions which extend beneath the boiler over thetubular grate bars, a pair of water tubes connecting the sides of theboiler with the ends of the rear header, and a fireproof partitionextending rearward from the boiler front imr" lir' ly over the 1 tubulargrate bars, which fireproof partition is supported by the transverselybent porwhich water tubes are provided with transversely bent portionswhich extend beneath the boiler over the tubular grate bars, a-fireproofpartition extending rearward from the boiler front immediately over thetubular grate bars, which fireproof partition is supported by thetransversely b nt ortions of the water tubes, and a vertically is'posedpartition carried by the rear one ofthe headers :tnd extending upward tothe rear porti'on of the horizontally disposed partition 4. Thecombination with a fire tube boiler arranged in a boiler settin of apair of mud v drui'ns arranged at the si es of the fire box .3

of the furnace, a pair of vertically disposed water legs connecting eachend of the boiler with the mud drums-3,3 pair of transversely disposed.headers arranged over .the'fire box, the front one of which headers isconnected to the frontpair of'weter legs, tubular rate bars connectingthe headers, a series 0 'vyater tubes connecting the boiler with the muddrums between the water legs, which water tubes arelprovided withtransversely bent portions which extend beneath the boiler over thetubular grate bars, a pair of water tubes connecting the sides of theboiler with the ends of the rear header, a fireproof partition extendingrearward from the boiler" front immediately over the tubular grate bythe transversely bent portions of the water tubes, and :1 verticallydisposed partition carried by the rear one of the headers and extendingupward tothe rear portion of the horizontally disposed artition.

The herein described boiler, comprising a tire tube boiler shell, a pairof horizontally disposedmud drums below the boiler shell, a verticallydisposed water leg connected to eachcnd of each. muddrum, tubesconnectbars, which fireproof partition is supported ing the upper endsof each. pair of water legs with the ends of the boiler shell, a headerconnected to the front pair of water legs, a header wronged beneaththecentral portion of the boiler tube, grate bars connecting the .headers,a series of water tubes connecting the sideoil the boiler shell with themud drums, which water tubes are provided with transversely bentportions which extend be neath the boiler shell, -and which transerselybent portions ere alternately .arranged, and Water tubes connecting theboiler siiril with the oxide of the hezuler be nenth the center of theboiler.

In testimony whereof, 11 here signed my name to this specification. inpresence of two subscribing witnesses.

- JAMES J. ROIIAN.

Witnesses:

1. Shil'lflt, E. M, Hennmcmn.

